Key facts
- Alert
- Flash Flood Warning (severe)
- Issued by
- National Weather Service, Flagstaff AZ
- Areas
- Coconino, AZ
- Places
- Moenkopi
- In effect
- until 2:00 AM MST, Oct 22, 2026
- Damage threat
- Considerable
What the National Weather Service says
“This is a life threatening situation.”
NWS Flagstaff AZ, Flash Flood Warning, 9:49 PM MST Oct 21, 2026 · official alert
“If you encounter flood waters...climb to safety.”
NWS Flagstaff AZ, Flash Flood Warning, 9:49 PM MST Oct 21, 2026 · official alert
“Life threatening flash flooding of areas in and around the Moenkopi Wash.”
NWS Flagstaff AZ, Flash Flood Warning, 9:49 PM MST Oct 21, 2026 · official alert
What to do
Stay away from the Moenkopi Wash and other creeks, washes and low-lying areas near it. If you encounter flood waters, climb to safety, as the National Weather Service instructs.
Do not drive into flooded roads or around barricades. The warning includes Highway 160, U.S. Highway 89 and State Route 264 in the marked sections, so expect possible closures and debris on roads.
Just 6 inches of moving water can knock you down, and 1 foot of moving water can sweep a vehicle away. Move to higher ground if water is rising near you.
Roads and driveways may be washed away in places. Check for updates from the National Weather Service until the warning ends.
Context
FEMA flood-insurance records list 300 claims in Coconino County from 1978 through 2026. These claims count only insured properties, so they do not show all flood damage in the county.
FEMA has made several disaster declarations for the county involving storms and flooding. The most recent in this record is number 4620 for severe storms and flooding, dated 2021-09-13.
Updates
- The flash flood warning expired at 2:00 AM MST.
- The National Weather Service extended the flash flood warning until 2:00 AM MST.
- The National Weather Service extended the flash flood warning until 10:00 PM MST.
- The National Weather Service extended the flash flood warning until 5:00 PM MST.
- NWS Flagstaff AZ issued the flash flood warning until 3:00 PM MST.
History here
Coconino County: 300 flood insurance claims in FEMA's National Flood Insurance Program records since 1978, most recent 2026.
Coconino County: recent federal disaster declarations
- DR-4620 (2021): severe storms and flooding
- DR-1940 (2010): severe storms and flooding
- DR-1888 (2010): severe winter storms and flooding
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Questions
- Is there a flash flood warning in Moenkopi, Arizona?
- Yes. The National Weather Service in Flagstaff issued a Flash Flood Warning at 11:02 AM MST for the Moenkopi Wash in Coconino County. It lasts until 3:00 PM MST.
- Why was the flash flood warning issued for Moenkopi Wash?
- A river gauge on the Moenkopi Wash reported a rapid rise of around 8 feet from thunderstorms producing heavy rain. Flash flooding is ongoing or expected to begin shortly.
- Which roads are affected by the Moenkopi Wash flash flood warning?
- The warning includes Highway 160 between mile markers 318 and 321, U.S. Highway 89 between mile markers 476 and 478, and State Route 264 between mile markers 323 and 324.
Sources
- NWS Flagstaff AZ: Flash Flood Warning, Oct 21, 2026 weather.gov
- FEMA OpenFEMA: NFIP claims and disaster declarations fema.gov
How this page is made. The Herebeat Hazard Desk builds event pages from official U.S. government data (National Weather Service, USGS, FEMA). The text is written with AI from that data; every number and quote is checked against the official source automatically before publishing, and the page is updated when the agency updates the event. The official source is always the reference. Spotted a mistake? info@herebeat.app. About the Hazard Desk.